<nav class="navbar navbar-inverse" role="navigation">
    <!-- 顶部导航栏 -->
    <div class="container-fluid">
        <div class="navbar-header">
            <h4 class="text-primary">博客</h4>
        </div>
        <ul class="nav navbar-nav navbar-right">
            <li><a>欢迎您,{$userInfo['admin_username']}</a>
            </li>
            <li><a href="{:url('backend/Account/logout')}">安全退出</a>
            </li>
        </ul>
    </div>
</nav>